In addition to cable being the primary means of providing service in the US which does allow for this, there are two reasons for doing it. First, down is all that is advertised. Up is only mentioned in small print usually. And second, the major ISPs and the content companies have merged so it’s an anti-“piracy” measure. It significantly impacts torrent seeding and hosting sites using residential Internet service.
How is this possible? Most of network hardware is symmetric. It doesn’t make sense.
In addition to cable being the primary means of providing service in the US which does allow for this, there are two reasons for doing it. First, down is all that is advertised. Up is only mentioned in small print usually. And second, the major ISPs and the content companies have merged so it’s an anti-“piracy” measure. It significantly impacts torrent seeding and hosting sites using residential Internet service.